Ensure your work tools and devices are powered thoroughly with the long-lasting and cost-effective energy of Energizer. This Energizer Alkaline Power 9V 522 BP Battery is designed to provide durable and reliable power for low-drain day-to-day electronic devices. This Energizer 9V battery will hold charge for up to seven years in storage, so you're always prepared with trustworthy, backup energy. The design of this 9V battery includes recycled materials and is leak-proof to ensure it'll be ready when you are.